Changed NuGet title to TestStack.BDDfy and allowed build server to pass ...

...version through

I find the text title very misleading in BDDfy's title. See:
![image](https://f.cloud.github.com/assets/453152/831621/8011fcd2-f1ff-11e2-8bde-e777653b08cc.png)

Bringing into line with other TestStack projects

![image](https://f.cloud.github.com/assets/453152/831622/972ad132-f1ff-11e2-8d71-79aa856500aa.png)